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Features

Degreasing Wool

A New Continuous Process

New Alloys of Aluminium

A Correction

Wire Nail Fallacies

Hints for Users and Manufacturers

By Robert Grimshaw

Wireless Telephony.–II

Its History and Present Status

By Reginald Fessenden

Safety Factors in Dams

San Francisco's Fire Service

A New and Efficient Service

By David Paul

Submarine Experiments of the past

Some Medieval Fancies Recently Realized

By Franz M. Feldhaus

The Crystallization of Water

By A. E. H. Tutton

The Untilled Field of Chemistry

Thoughts on the Potential Energy of Matter

By Arthur D. Little

Caoutchouc and Artificial Rubber

Dirigible Balloons

Theoretical Speculations

By Heinrich Von Helmholtz

Testing Paper Materials

Airship Harbors

An Idea for Dirigible Balloon Inventors

By F. W. Ilges

The Production of Copper in Japan

How to Trisect an Angle

Mechanical Solutions of an Old Problem

By A. Aubry

A Simple Metric Conversion Table

Changing Metric Units Into English Equivalents

By Walter T. Swingle

Carbon Tetrachloride

Trade Notes and Formulæ

Electrical Notes

Engineering Notes

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    March 20, 1909

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